Rotary blower and exhauster.



T. W. GREEN. ROTARY BLOWER AND EXHAUSTEB.

APPLICATION rum) JULY 1,1909.

Patented 00$. 18, 1910.

5 SHEETS-SHEET 1.

T. W. GREEN. ROTARY BLOWER AND EXHAUSTER.

APPLICATION FILED JULY 7, 1909. 973,]. 90. Patented Och-18, 1910.

Imi'HIcAnA T. W. GREEN. ROTARY BLOWER AND EXHAUSTER. APPLICATION FILEDJULY 7, 1909.

5 SHEETBSIEET 3.

Patented Oct. 18, 1910.

T. W. GREEN. ROTARY BLOWER AND EXHAUSTER. APPLICATION I'ILED JULY 7,1909.

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ROTARY BLOWER AND EXHAUSTEB. APPLIOATION FILED JULY 7, 1909,

Patented Oct. 18, 1910.

5 SHEETS-SHEET 5.

THOMAS W. GREEN,

OF PHILADELPHIA, PENNSYLVANIA.

ROTARY BLOWER AND EXHAUSTER.

Specification of Letters Patent, Application filed July 7, 1909. SerialNo. 506,372.

Patented Oct. 18, 1910.

To all whom it may concern:

Be it known that I, THOMAS W. GREEN, a citizen of the United States,residing in Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inRotary Blowers and Exhausters, of which the following is aspecification.

This invention relates to improvements in umps or blowers, gasexhausters, etc., and has particular reference to a device wherein thepumping means is formed by three compound co-acting locking members,placed side by side, and is designed as an lmprovement on the patentanted to me May 30th, 1905, No. 791,147, or rotary blowers andexhausters. In the device shown and described in that patent, the threeco-acting locking members and also the wings of the impeller extend inan unbroken line from side to side of the interior of the blower casing.With that construction, the heads at each end had to be weighted on oneside to counterbalance the Weight of metal in the oppositecrescent-shaped portion. This same condition is present in the impelleror central portion carrying the wings, although in a somewhat lessdegree. As the machines run at a high rate of speed, thecounter-balancing requires nice adjustment and adds of the parts.

The objects of my present invention are to rotary nicely balance all ofthe revolving parts of the blower, without adding thereto anyunnecessary weight, and to increase the pressure at which the fluidacted upon is discharged from the outlet.

Another object of the invention is to provide means whereby an increasedamount of fluid may be passed through the device at a low pressure- Toaccomplish these results, I divide the side locking members and also theim eller crosswise into two parts or sections, acing in oppositedirections (which members, by reason of being composed of oppositelydisposed sections, I term compound,) and place across the inside of theblower casing at the point where the reversed portions meet, a closedpartition or wall that divides each of the co-acting parts of the blowerand the surrounding case into two parts, thus making practically adouble blower, with the corresponding parts of the same size. Toincrease the pressure, I construct the impeller with two compartments,one communicating with the intake and the other with the dlscharge ofthe blower, communication between the two compartments being establishedthrough channels in the impeller. 'The fluid to be acted on passes intothe first com artment where it is compressed slightly, an is then passedalon' to the second compartment, where it is stil further compressedbefore being finally discharged from the blower.

In the drawings 2-Figure l is a transverse vertical section on line a-aof Fig. 2, showing the three locking members in one chamber (chamber A),in full lines, and indicating the three locking members in the otherchamber (chamber B), in dotted lines. Fig. 2 is a horizontal sectiontaken on line b-b of Fig. 1, showin the interior arrangement of thedevice, and the relative positions of the locking members therein. viewof a modified form of the central locking member, shown in Figs. 1, 2,7, 14, and 15. Fig. 4. is a view of the preferred form of impeller shownin Figs. 8,

Fig. 3 is a impeller or considerably to the weight I 9,10, 11, 12, and13, with a part of the upper portlon broken away to show the internalconstruction. Fig. 5 is a top view of one of the side locking members inthe position shown in Figs. 2 and 10. Fig. 6 is a central horizontalsectional view of the side looking member. Fig. 7 is a cross-sectionalview of a modified form of the impeller, one of the blades being omittedto show the channel extending therethrough. Fig. 8 is an end elevationof the preferred form of impeller or central locking member shown inFigs. 4, 9, 10, 11, 12, and 13. Fig.9 is a horizontal sectional View ofthe impeller taken on line cc of Fig. 8; showing the channel extendingtherethrough from the forward side of the blade in one chamber to therear side of the blade in the adjoining chamber, and also the spirallyshaped openings for establishin communication between the intake and thechamber adjacent thereto, and the outlet and the adjacent chamber. Fig.10 is a horizontal sectional view of the device similar to Fig. 2, withthe exception that the impeller or central locking member shown thereinis of the referred form, the impeller shown in Fig. 2 ing a modifiedform. Fig. 11 is a vertical cross-sectional view taken on line 4P4) ofFig. 10, showing the channel connecting the two chambers extending fromthe forward side of blade 23, to the rear side of blade 22. Fig. 12 is avertical transverse sectional view of the device taken on .line H ofFig. 11. Fi 13 is a horizontal sectional view of the impeller taken online dd of Fig. 8, showing in full lines the spiral opemn adapted toconnect one o amber with t e intake and the other chamher with theoutlet, and showing in dotted lines the channel connecting the twochambers. Fi 14 is a vertical sectional view of the mo ed form ofimpeller, taken on line yy of Fig. 3, and Fi 15 is a similar view takenon line zz of ig. 3.

Referring to the drawings, the numeral 1 indicates the base upon whichis mounted the casing or shell 2, of the rotary pump or blower.

The numeral 3 indicates the intake which is located at the forward endof the blower casing, the outlet 3 being similar in construction andlocated at the opposite or rear end of the blower casing as shown.

The numeral 4 indicates a partition or wall, dividing the interior ofthe casin into two separate chambers, A. and B. Tl his parti-. tion 4fits snugly around the central impeller and co-acting side lockingmembers, making a close fit and preventing any of the fluid acted uponfrom assing forward except through the channe in the central part of theimpeller.

The numeral 5 indicates segmental off-sets in the sides of the casing,extending the length thereof, as shown. In each of these olf -sets 5, inthe sides of the casing, is mounted a rotatable compound locking member6, as shown in Figs. 1, 2, 10, and 12, for purposes hereinafter stated.It will be observed that each of these rotatable side lockingmembers 6,is composed of two se arate and oppositely disposed locks 7 an 8, andwhich are arranged side by side, as

shown in Figs. 2, 5, 6 and 10. One of these locks, 7, is adapted to setand operate in the chamber A, and the other, 8, is adapted to set andoperate in the chamber B, as shown in Figs. 2 and 10. These side lockingmembers are journaled on shafts 9, 9, and 10, 10, in suitable bearingson the ends of the casing 2. The side locking members 6 are eachcomposed of three circular heads 11, 11,11, connected by interveningcrescent-shape web portions 12, 12, as shown in Figs. 5 and 6.

The outer surface 13 of the crescent-shape portion 12, has the samecurve as the segmental extension 5, into which it snugly fits, and theinner surface 14, is made on an are greater than the outer surface 13,for a pur ose hereinafter stated.

'e numeral 15 indicates the main driving shaft, journaled in suitablebearings in the ends of the casing 2, centrally thereof, as shown. Onthe end 16, of the shaft 15, outside of the casing 2, is a drivin pulle17. Inside of the pulley 17, on t e sha t 15, is a co -wheel 18, adaptedto mesh with correspon in cog-wheels, 19, 19, on the ends of the s afts10, 10, carrying the side locking members 6. Rigidly secured to thedriving shafts 15, is an impeller 20, consisting of a cylindricalportion 21, the diameter of which is the same as the diameter of each ofthe side locking members 6. Secured to this cylinder, at dlametricallyopposite sides thereof, are impeller blades 22, 23. Each of theseimpeller blades is made to fit snugly in the chamber, in which it isworking, and the width of each of said blades is the same as thedistance between the circular heads 11 of the members 6, with which itco-acts, and said blades are of such length as to sweep the innerlocking surfaces 14, of the side locking members 6, and the innercircular surface of the casing 2, in the chamber in which they are 0erated, to form a look, as is apparent. ile the im eller blades aresecured to the opposite si es of the cylinder 21, it will be noticedthat one, 22, is secured'to-the left-hand side and works in the chamberA; while the other, 23, is secured on the right-hand side thereof, insuch position as to operate in the chamber 7 B. The distance between theadjacent edges of said blades is e ual to the thickness of the partition4, an the same as the thickness of the heads 11 that divide each of thelocking members 6 into two compartments. Adjacent to each side of eachof the impeller blades is an opening or passage, as shown.

The numeral 24 indicates the opening at the rear side of the blade 23which extends spirally to and communicates with the intake 3 of theblower.

The numeral 25 indicates an opening to the forward side of the blade 23which communicates through a channel 26 with the opening 27 at the rearside of the blade 22, whereby communication between the two chambers Aand B is established.

28 indicates the opening to the forward side of the blade 22 and extendsspirally to and communicates with the outlet or discharge 3 of theblower, as is evident.

The partition 4, between the chambers A 1 that it may be more easilyadjusted to fit members and around the impeller.

and 15 I have illustrated impeller to be used when volume is desired,and no high pressure is required. In this impeller, it will be noticed,that the channel in the rear of the impeller blade connects directlywith both the discharge and the intake sides of the blower, andcomparatively little compression takes place in the compartments A andB.

The numeral 20 indicates the impeller mounted on the shaft 15, andcomprises a cylindrical portion 21' and two impeller blades 22 and 23.

The numeral 26 indicates a channel extending through the cylinder 21from the intake side of the blower, back of the blade 23 toward theoutlet side of the blower to the rear side of the impeller blade 22 inthe next chamber, and 25 is an opening to the forward side of blade 23and 27 is a similar opening to the forward side of blade 22', and 26" isa channel connecting such openings.

The blower being started in the direction indicated by the arrow inFigs. 1 and 12, the movement of the impeller blade 23 will force all ofthe air in advance of said blade in the chamber B through the opening 25and channel 26 into the chamber A or the opposite end of the blower andout through the discharge 3*. The forward movement of the impellerblade, that forces the air through the channel 26, will create a vacuumin the chamber at the rear of said blade, and cause the air to rush infrom the outside atmosphere, thus filling all unoccupied space in theforward part of the blower. The air coming in at the rear of theimpeller blade 23 is locked in and cannot get out, except through theopening 25 to the forward side of the blade 23, and the channel 26, thatleads to the discharge side of the blower. The air is continuouslysucked in and forced forward in a steady stream and as it enters thesecond chamber in a compressed condition, it will. be further compressedin its passage through the said chamber.

The operation of the blower is the same, whether the form of theimpeller shown in Figs. 1, 2, 3, 7, 14, and 15, is used, or thepreferred form shown in Figs. 4, 8, 9, 10, 11, 12, and 13; the onlydifi'erence is that when the preferred form shown in Figs. 4, 8, 9, 10,11, 12 and 13, is used, all of the fluid acted upon must first gothrough the chamber B, passing into the chamber A in a compressedcondition, while with the form of impeller shown in Figs. 1, 2, 3, 7 14and 15, the fluid passes from the outside atmosphere directly around thelocking central part of the In l igs. 3, 7, 14 at modified'form of {intoboth chambers, and anincreased volume at lower pressure is discharged atthe outlet of the blower.-

If desired the co-acting parts of the blower may be further compoundedand instead of being divided into two sections, as shown, there may bethree or more, and an increased pressure thus obtained.

It will be apparent that, by reason of the construction of the impelleror central locking member, the several parts thereof will practicallybalance oneanother during the rotation of such impeller. It will also beevident from the formation of the side looking member 6 that theselocking members will, practically, be balanced during rotation, as aheavy ortion of one section will be in line with a ighter portion of thesame section and on opposite sides of its shaft. It .will also be notedthat this balanced condition of all the locking members is uniformlymaintained by reason of these members being so geared that theirrelative positions cannot be changed during operation.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is l. A rotary pump orblower having there in twocrescent shape side locking members and animpeller located between said crescent shape side locking members andcoacting therewith; both of said crescent shape side locking members andalso the impeller being divided cross-wise into sections and the partsconnected together in such position, that the heavy portion of onesection will lie in a direct line with and adjacent to the lighterportion of the other section of the same member.

2. A rotary pump or blower having there in two compound side lockingmembers and an impeller located between said side locking members andco-acting therewith; the impeller being provided with a suitable port.or channel that forms a communication between the intake and dischargeof the blower, the crescent shape locking members and the impeller beingdivided cross-wise and the parts connected in reversed'positions, sothat the weight of each member will be evenly distributed on oppositesides of the respective driving shafts. 4

3. In a rotary blower, the combination of the two compound rotary sidelocking members 6, the impeller 20 located between said side lockinmembers, and co-acting therewith, and aving wings on opposite sides andat opposite ends thereof and the casing 2, surrounding the impeller andside locking members, and having therein the separate chambers, A and B.

4. In a rotary blower, the combination of two compound side-lockingmembers and a co-acting im eller located between said sidelocking memers, the central portion of said impeller having therein a passage-way,the forward part of which communicates with the intake and the rearportion with the discharge of the blower.

5. In a-rotary blower, the combination of two compound rotary sidelocking members and a co-acting impeller located between 10 said sidelocking members, the central portion of said impeller having therein twochannels, both of which communicate with the inlet side of the blower.

In testimony whereof I atfix my signature, in presence of two witnesses.

THOMAS W. GREEN.

\Vitnesses S. I. HARPER, Tnos. D. Monws.

